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Finding the Fourth Proportional to 511.60, 767.94 and 485.68

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Solution

The fourth proportional to 511.60, 767.94 and 485.68 is: 729.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    511.60 : 767.94 = 485.68 : x
  2. Step 2: Convert to fraction form
    511.60/767.94 = 485.68/x
  3. Step 3: Cross multiply
    511.60x = 767.94 × 485.68
  4. Step 4: Simplify right side
    511.60x = 372,973.10
  5. Step 5: Solve for x
    x = 372,973.10/511.60
  6. Step 6: Final answer
    x = 729.03

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.